Title:
MULTI-PHASE SQUIRREL-CAGE INDUCTION MOTOR
Document Type and Number:
WIPO Patent Application WO/1986/005337
Kind Code:
A1
Abstract:
A variable-speed multi-phase squirrel-cage induction motor which is driven by a variable-frequency power source of the pulse-width modulation type, which exhibits constant torque characteristics when it runs at speeds lower than a predetermined rated speed, and which exhibits constant output characteristics when it runs at speeds higher than the predetermined rated speed. The number of series conductors has been selected on the stator side of the motor, so that the motor runs at speeds faster than said predetermined rated speed when the frequency of said variable-frequency power source is increased to be higher than a commercial frequency. Therefore, the output can be increased without changing the external size of the motor.
Inventors:
KAWADA SHIGEKI (JP)
NAKAMURA KOUSEI (JP)
NAKAMURA KOUSEI (JP)
Application Number:
PCT/JP1986/000102
Publication Date:
September 12, 1986
Filing Date:
February 28, 1986
Export Citation:
Assignee:
FANUC LTD (JP)
International Classes:
H02K17/12; H02P27/08; (IPC1-7): H02P7/63
Foreign References:
| JPS3813178Y1 | ||||
| JPS5094430A | 1975-07-28 |
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